Notes

At this moment these SlackBuilds are from and for Slackware64 Linux -current, but they
should work with Slackware Linux -current also.

I tried to make the minimal modificactions to the originals Slackbuilds.

There is not need to select a type of font rendering (Windows, Apple or Ubuntu)
since the "aim of infinality-bundle is to make use of the vast potential hidden
in native Linux font rendering back-end". This does not mean you can not
configure some aspects of the font rendering, please check:

/etc/profile.d/infinality-settings.sh

/usr/doc/fontconfig-*/fontconfig-infinality-ultimate

You can see the differences between the default font rendering and the patched one, (from
Slackware 14.1):